I usually don't read the instructions to a game first - just dive in. I'm a big fan of matching games. If there was a little hint "match four" in Orchard's speech bubble right at the beginning that would have been perfect. I was trying to match three, then make rows.
It would be nice to have more sound and visual effects when you match four - especially if you match the bonus color. Maybe the dog barks or something? If you have a cascade, maybe something bigger happens? I love getting feedback for game accomplishments. Like mini achievements.
The timer is very subdued when your eyes are scanning the board. Perhaps it could pulse a little when it changes colors? I didn't notice it until my third game.
Overall, very polished. Great job!